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Simplifying r + 5(r + -7) = 7 Reorder the terms: r + 5(-7 + r) = 7 r + (-7 * 5 + r * 5) = 7 r + (-35 + 5r) = 7 Reorder the terms: -35 + r + 5r = 7 Combine like terms: r + 5r = 6r -35 + 6r = 7 Solving -35 + 6r = 7 Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '35' to each side of the equation. -35 + 35 + 6r = 7 + 35 Combine like terms: -35 + 35 = 0 0 + 6r = 7 + 35 6r = 7 + 35 Combine like terms: 7 + 35 = 42 6r = 42 Divide each side by '6'. r = 7 Simplifying r = 7
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